While I'm new to the process, I think the orthodoxy answer is to let the walk away spouse initiate that conversation if it's going to happen... though perhaps someone wiser than I could suggest a way to break the ice and ease her into that?
Me: 36 Her: 35 Together 7/09 Married 8/7/10 Separate rooms since at least April 11 "I've decided I want a divorce" 12/5/11 She moves out of state/files 2/7/12 Dissolution final 5/12
